32 Full formal procedure Very simple description (see Bouwmeester et al.) Particle 2 and 3 are prepared in an entangled state where one particle is always in the "opposite" state of the other. When the result of the Bell measurement between 1 and 2 is then 2 is in the "opposite" state of the unknown state of 1. Thus particle 3, being in the opposite state to 2, will be in the same state as 1. If the result of the Bell measurement is a different state, the appropriate rotation has to be applied to particle 3.

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